Freightliner M2 Side Marker Bulb Size

The Freightliner M2 front side marker bulb uses a 194NA size bulb across multiple production generations. The replacement chart covers vehicle data spanning from 2002 to 2024.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Side Marker

Years	US Type	EU Type	Shop
2002-2024	194NA	WY5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10), natural amber glass. 12V, 3.78W.	194NA	Check Price

Other Locations

Additional Notes

The Freightliner M2 uses the 194NA bulb for the front side marker position across the 2002-2024 model years.
The 194NA is a miniature wedge-base bulb conforming to the T10 form factor, which refers to a tubular bulb body roughly 10/8 of an inch wide at its widest point.
The bulb operates at 12 volts and draws 3.78 watts, placing it in the low-wattage range typical of marker and clearance lighting applications.
The "NA" suffix in the 194NA designation indicates natural amber glass, meaning the amber color is produced by the glass envelope itself rather than by a painted or coated lens or housing.
The 194NA meets ANSI standards applicable in both the United States and Canada, reflecting a standardized specification for electrical and photometric performance.
The wedge base design of the 194NA means the bulb is retained by friction from the socket rather than by a bayonet or screw mechanism, which is a common trait in low-wattage automotive marker bulbs.
Because the amber color is integral to the glass of the 194NA, substituting a clear 194 bulb of the same base type would alter the emitted light color and may not satisfy regulatory requirements for amber side marker lighting.